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K Ohta M Nishi M Ueda S Ohyama T Matsubara T Takahashi T Nakajima 《Canadian Metallurgical Quarterly》1998,99(9):589-594
Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients. 相似文献
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鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美". 相似文献
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The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed. 相似文献
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Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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Investigated whether self-ratings of ability can be used as substitutes for ability tests in an industrial setting. 114 undergraduates first completed a questionnaire asking them to rate themselves on 10 ability areas. The Ss were then given a battery of tests designed to test these same ability areas. Tests included the Employee Aptitude Survey Test of Visual Pursuit and Manual Speed and Accuracy, the Revised Minnesota Paper Forms Board Test, Personnel Tests for Industry—Verbal and Numerical, the Otis Self-Administering Tests of Mental Ability, and the Bennett Mechanical Comprehension Test. In addition, the potential moderator effects of sex, general intelligence, self-esteem, and social desirability were investigated. Correlations between self-rated and tested abilities, although generally significant, were too small to have any practical significance. The self-ratings were also unable to diffentiate between those who would score high and low on the ability tests, even for extreme self-rated groups. No moderator effects were found. It is concluded that self-reports of ability could not substitute for ability tests. (16 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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B Amy de la Bretèque 《Canadian Metallurgical Quarterly》1995,116(4):271-272
The adolescent's breaking of the voice is the result of the substitution of the chest voice (or heavy mechanism) for the head voice (or light mechanism). In cases of late breaking, the voice is abnormally high-pitched and feeble, often with a distorted timbre, while the larynx is normal and pubescent. Such people are generally not fully aware of their voices' real nature. Therapy classically resorts to laryngeal manipulations, of which a new technique is put forward. Another therapeutic approach is based, on the one hand, on critical listening compared with a control male voice, thus enabling the subject to become aware of his own voice, and, on the other hand, on high intensity work which helps passing from head to chest voice. 相似文献
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通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。 相似文献
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Translated from Poroshkovaya Metallurgiya, No. 2(326), pp. 9–12, February, 1990. 相似文献
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Acute vascular insufficiency following intra-arterial injection of a variety of drugs has been recognized for many years. The present study addresses the hypothesis that this vascular insufficiency may be due to vasospasm. Intra-arterial injections of logarithmic doses of drugs of abuse from the barbiturate, narcotic, non-narcotic analgesic, and amphetamine groups were studied in baboons. All drugs except amphetamine produced significant increases in femoral flow. Dextroamphetamine produced insignificant alteration in flow. Solid excipients, cornstarch, and talcum powder when injected intra-arterially decreased flow, and vascular obstruction was shown angiographically. These data suggest that vasospasm is not a primary response of intra-arterial injection of drugs of abuse. 相似文献
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针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。 相似文献
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A Duquette S Kérouac BK Sandhu P Saulnier L Lachance 《Canadian Metallurgical Quarterly》1997,22(2):257-278
The purpose of this study was to verify a model of relationships between psychosocial factors and health for 8066 francophone nurses working in geriatric care in Québec. A random sample of 1990 subjects was drawn and a participation rate of 77.9% and 55% was obtained for the two-time study taken twelve months apart. Based on the theory of Maddi and Kobasa (1984), the model was reproduced for the two-time periods with the aid of structural equations. The analyses showed that three variables exert a direct influence on psychological distress: professional burnout, occupational stressors and hardiness. Also, variables have a direct effect on burnout: listed in order of importance, these are hardiness, occupational stressors, work support, active strategies of coping and employment status. In dealing with the work stressors, the nurses who are hardy make use of active strategies of coping and look for support form their colleagues. The results of the study help to better understand the psychological and social resources that best favor adaptation of working women in highly demanding work environments. The fallout of the study converges towards the quality of life of helping professionals and towards the cost and quality of health and social services. 相似文献
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V. A. Ivensen 《Powder Metallurgy and Metal Ceramics》1993,32(8):696-703
The possible participation of excess vacancy generation and annihilation processes in the formation of active imperfections, and the effect of these processes on the kinetics of pore volume shrinkage are considered. The proposed three-stage model x-U-y-W includes a system of equations from which the W(t, T) relationship for isothermal and nonisothermal sintering regimes can be calculated with the aid of a computer (W=v/v, where v=pore volume).Scientific-Research and Planning Institute of Refractory Metals and Hard Alloys. Translated from Poroshkovaya Metallurgiya, No. 8(368), pp. 47–56, August, 1993. 相似文献
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V. G. Shevchenko V. I. Kononenko I. N. Latosh M. A. Bulatov N. V. Lukin L. R. Saksonova E. K. Dobrinskii S. I. Malashin E. A. Gostyukov 《Powder Metallurgy and Metal Ceramics》1991,30(5):422-424
Translated from Poroshkovaya Metallurgiya, No. 5(341), pp. 80–82, May, 1991. 相似文献
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F Meunier-Carpentier M Staquet J Klastersky 《Canadian Metallurgical Quarterly》1976,16(11-12):625-630
A comparative study was performed using three routes of administration of sisomicin (1 mg/kg as single dose): intramuscular injection, intravenous rapid injection, and 1-hour infusion. Intravenous administration resulted in higher blood levels immediately after the injections than by the intramuscular route; however, later, the intramuscular injection resulted in optimal blood levels. High levels of sisomicin which were bactericidal for most Gram-negative bacilli were found in the urine of the treated patients. The antimicrobial activity of the serum obtained 1 hour after administration of sisomicin, as determined against 20 strains of Gram-negative microorganisms isolated from blood cultures, was identical with all three routes of administration of sisomicin. 相似文献
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本文介绍了纳米高强度复合材料所用的纳米材料制备方法、纳米复合材料制备工艺和强度改善进展。目前陶瓷纳米复合材料是人们开发的热点。碳纳米管与其它材料的复合材料的开发也是热点。最后介绍了应用前景。 相似文献
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M. M. Churakov 《Powder Metallurgy and Metal Ceramics》1991,30(5):399-402
Translated from Poroshkovaya Metallurgiya, No. 5(341), pp. 56–60, May, 1991. 相似文献
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V. V. Stasovskaya 《Powder Metallurgy and Metal Ceramics》1965,4(11):912-914
Summary The abrasive capacity of carbides and borides of titanium, zirconium, hafnium, vanadium, chromium, tantalum, molybdenum, and tungsten was investigated. 相似文献